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Acoustic Summary For CU-3 Project: Ramsey WTP Prepared By: Tim May Outdoor Unit Parameters: Tag Name: CU-3 Unit Model: 38AUD Unit Size: 12.5 Tons System Type: Dx Cooling Only Refrigerant Type: PURON Compressor Quantity: 2 Compressor Type: Scroll Advanced Accoustics Parameters 1. Unit height above ground: 1.0 ft 2. Horizontal distance from unit to receiver: 20.0 ft 3. Receiver height above ground: 5.7 ft 4. Height of obstruction: 0.0 ft 5. Horizontal distance from obstruction to receiver: 0.0 ft 6. Horizontal distance from unit to obstruction: 0.0 ft Detailed Acoustics Information /////////////////i 10/10/2024 09:24AM 10 lOctave Band Center Frequency, Hz 31 63 125 250 500 1 k 2k 4k 8k Overall Sound Power Levels at Unit's Acoustic Center (Lw), dB 85 65 69 71 83 79 74 69 62 88 A-Wgted Sound Power Levels at Unit's Acoustic Center 46 39 53 63 80 79 75 70 61 83 (LwA), dBA Sound Press. Levels at Dist. Specified above (Lp), dB 61 40 45 47 58 55 50 45 38 64 A-Wgted Sound Press. Levels at Dist. Specified above 21 14 28 38 55 55 51 46 36 59 (LpA), dBA Calculation methods used in this program are patterned after the ASHRAE Guide; other ASHRAE Publications and the AHRI Acoustical Standards. While a very significant effort has been made to insure the technical accuracy of this program, it is assumed that the user is knowledgeable in the art of system sound estimation and is aware of the tolerances involved in real world acoustical estimation. This program makes certain assumptions as to the dominant sound sources and sound paths which may not always be appropriate to the real system being estimated. Because of this, no assurances can be offered that this software will always generate an accurate sound prediction from user supplied input data. If in doubt about the estimation of expected sound levels in a space, an Acoustical Engineer or a person with sound prediction expertise should be consulted. Acoustic Note: 1. 38AUZ/D/Q units sound ratings are in accordance with AHRI 270-2008 - Sound Rating of Outdoor Unitary Equipment. 2. The acoustic center of the unit is located at the geometric center of the unit. 3. All estimated sound power levels, dB re 1 Picowatt should not be guaranteed or certified as being the actual sound power levels. Acoustic Note: 1. Estimated Sound Power levels - dB re: 1 picowatt 2. Estimated Sound Pressure levels - dB re: 20 micropascal 3. Estimated sound levels given above are assumed to originate at the acoustic center of the unit. The acoustic center of the unit is located at the projection of the condensing unit's geometric center of its base. 4. Sound power levels shown above were determined in accordance with ARI standard 370 for large outdoor refrigeration and air conditioning equipment. 5. Calculation methods used in this program are patterned after the ASHRAE Guide; other ASHRAE Publications and the ARI Acoustical Standards. While a very significant effort has been made to insure the technical accuracy of this program, it is assumed that the user is knowledgeable in the art of system sound estimation and is aware of the tolerances involved in real world acoustical estimation. This program makes certain assumptions as to the dominant sound sources and sound paths which may not always be appropriate to the real system being estimated. Because of this, no assurances can be offered that this software will always generate an accurate sound prediction from user supplied input data. If in doubt about the estimation of expected sound levels in a space, an Acoustical Engineer or a person with sound prediction expertise should be consulted. Commercial Split Systems Builder 1.67 Page 8 of 15